diff options
| -rw-r--r-- | src/librustc_trans/abi.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/librustc_trans/abi.rs b/src/librustc_trans/abi.rs index c2b040c32f6..42289ec094f 100644 --- a/src/librustc_trans/abi.rs +++ b/src/librustc_trans/abi.rs @@ -35,6 +35,7 @@ use std::cmp; pub use syntax::abi::Abi; pub use rustc::ty::layout::{FAT_PTR_ADDR, FAT_PTR_EXTRA}; +use rustc::ty::layout::Layout; #[derive(Clone, Copy, PartialEq, Debug)] enum ArgKind { @@ -317,6 +318,11 @@ impl FnType { if ty.is_integral() { arg.signedness = Some(ty.is_signed()); } + // Rust enum types that map onto C enums also need to follow + // the target ABI zero-/sign-extension rules. + if let Layout::CEnum { signed, .. } = *ccx.layout_of(ty) { + arg.signedness = Some(signed); + } if llsize_of_real(ccx, arg.ty) == 0 { // For some forsaken reason, x86_64-pc-windows-gnu // doesn't ignore zero-sized struct arguments. |